baber/WOPTO huggingface dataset:
Patent GB-1528377-A (GB)
Title: Halftone printing
IPC: B41J2/52
Filed: 1975-10-15
Abstract: 1528377 Pseudo halftone printing INTERNATIONAL BUSINESS MACHINES CORP 15 Oct 1975 [20 Jan 1975] 42145/75 Heading H4F [Also in Division G4] A method of operating a matrix printer selectively operable to print a mark at any of n matrix positions in a print area to produce a pseudo halftone copy of an original from a sequence of signals, each signal representing the tone or grey level of a respective incremental area of the original, comprises using a random number generator to select on a chance basis one of n numerical values, establishing from the randomly selected value an order of the matrix positions such that marks have to be printed at the first p positions in the order to produce a tone level p, 0#p#n; and printing p marks at the first p positions in the order to produce a print area having a tone level p necessary to produce a tone level corresponding to that of an original incremental area being reproduced. It is stated that this method avoids the production of MoirÚ fringe patterns. Examples of dot patterns produced by a 4 x 4 matrix printer are shown in Fig. 9: these are produced by comparing 10 a grey scale input with the output of a randomly initialized modulo-N<SP>2</SP> counter 18-19 repeatedly incremented by N, and printing at a matrix position if the level is greater than the counter output.
Patent GB-1082743-A (GB)
Title: Obstetrical drapes
Inventor: CREAGER PAUL
IPC: G06K15/22
Filed: 1965-10-05
Abstract: 1,082,743. Surgical drape sheets. PARKE DAVIS & CO. Oct. 5, 1965, No. 42195/65. Heading A5R. A drape sheet for obstetrical use is made of flexible plastics material, e.g. polyvinyl chloride sheet and at one end has a central arcuate cut-out portion 11 defining bifurcated end portions 14. The sheet is secured to the patient by pressure sensitive adhesive 18 on one side or adhesive sprayed on to the skin so that it extends from one thigh to the other across the perineum leaving the vagina exposed through the cut out portion and isolated from the anus. A faeces collecting pouch (not shown) may be provided on the side of the sheet nearest the patient. The sheet is stiffened by a removable paper liner of the same size and shape and secured by a wax layer to the outermost side of the sheet or by the pressure sensitive adhesive to the innermost side of the sheet.
Patent GB-982676-A (GB)
Title: Improvements in or relating to centrifuges and to methods of separating immiscible liquids
Inventor: VALLIS DEREK GORDON
IPC: B04B1/00
Filed: 1960-12-08
Abstract: 982,676. Centrifugal strainer separators. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov. 29, 1961 [Dec. 8, 1960], No. 42279/60. Heading B1D. A centrifuge comprises a porous wall 1, e.g. of sintered glass, whose surface is either hydrophobic or hydrophilic and whose pore size, normally between 5 and 100 microns, is such that one liquid of a dispersion consisting of a hydrophobic liquid and a hydrophilic liquid can pass more easily therethrough than the other under the action of centrifugal force, fused to a glass cup 2 mounted on a shaft 3 for rotation by a centrifuge motor. Tubes can be used to introduce liquid to the base of the cup.
Patent GB-1440314-A (GB)
Title: Butterfly valves
IPC: F16K1/226
Filed: 1972-09-12
Abstract: 1440314 Valves UNITED GAS INDUSTRIES Ltd 3 Sept 1973 [12 Sept 1972] 42288/72 Heading F2V In a butterfly valve the closure disc 2, which is rotatable about axis A-A, engages a rectangular-sectioned sealing ring 6 in the closed position, the ring 6 having an inner peripheral surface 19 angled normal to the lines B-B taken from the centre of the pipe line coinciding with the axis A-A to the central periphery of the disc. The rubber ring 6 is provided with tapered wedges which snap into notches 17 of the complementary groove 16. Boss 4 in the pipe and cap 3 on the actuating shaft 5 limit rotation of the disc to 90 degrees.
Patent GB-892940-A (GB)
Title: Improvements relating to shoe heels
IPC: A43B21/30
Filed: 1960-12-08
Abstract: 892,940. Heel protectors. VERGER, A. Dec. 8, 1960 [Dec. 8, 1959; Dec. 1, 1960], No. 42317/60. Classes 17(2) and 17(3) A heel construction comprises a cylindrical or tubular sleeve 2 which is fitted in a socket member 6 attached to the heel, and has lower and upper portions 12, 13 of square cross-section, the latter housing a spring 4 and a nut 5, and a heel piece 1 carried by a threaded stud 3 which engages the nut 5 and has a block 9 engaging into the portion 12. The sleeve which is a force fit in the socket and has a flange 8 engaging the lower end of the socket member, may be of square external cross-section and may be made of steel to strengthen the heel. The heel piece may include a dished member 10 which fits on block 9 and prevents rotation of the heel piece.
Patent GB-1523949-A (GB)
Title: Process for recovering organotin halides
IPC: C02F1/50
Filed: 1976-10-12
Abstract: The process is used for isolating, for example for the purpose of recovering, compounds of the formula  (CH3)aSnX4-a or C4H9SnX3 in which a is 2 or 3 and X denotes chlorine, bromine or iodine, in virtually pure form from an aqueous medium which contains over 55 per cent by weight of this halide in the form of a water-insoluble complex with ammonia or an amine. To this end, the aqueous medium is first combined with a chemically inert, water-soluble inorganic salt and a non-oxidising mineral acid. The resulting solution is then heated to cause a separation of the organotin halide from the aqueous phase, and the tin halide which has precipitated is isolated.
Patent GB-1116631-A (GB)
Title: Method of winning mineral, and an appliance therefor
IPC: E21C29/06
Filed: 1965-10-08
Abstract: 1,116,631. Mineral-mining machine haulages. GEWERKSCHAFT EISENHUTTE WESTFALIA. 8 Oct., 1965 [12 Nov., 1964], No. 42747/65. Heading E1F. The haulage for moving a mineral-mining machine to and fro along a mineral face comprises a cable or chain of fixed length, the chain being secured by one end at one end of the face to pass about a pulley secured on the nearer end of the machine to a pulley anchored at said end of the face before passing to a drive station at the other end of the face for reversal to and about a pulley on the adjacent end of the machine to be anchored at the end of the face adjacent the drive station. The anchored pulley may also be driven.
Patent GB-1426848-A (GB)
Title: Process for the preparation of malonic acid dinitrile
IPC: C07C67/00
Filed: 1974-10-07
Abstract: 1426848 Malonic acid dinitrile LONZA Ltd 7 Oct 1974 [18 Oct 1973] 43346/74 Heading C2C Malononitrile is obtained by reacting cyanogen chloride and acetonitrile in the gas phase at 700-1200 C., quenching the gaseous reaction product and isolating the malononitrile by distillation, the acetonitrile being preheated to 110-700 C. (e.g. at a velocity of 20-100 m./ sec.) and the quenching being effected with liquid reaction product to a temperature of from 40 C. to substantially the boiling temperature of the reaction product (e.g. to 55- 78 C.) with the simultaneous driving off of the waste gases. A cyclic operation is preferred wherein part of the reaction mixture is used for a subsequent quenching and unreacted acetonitrile is separated and recycled to the reaction.
Patent GB-1144359-A (GB)
Title: Tunnelling machine
IPC: E21D9/12
Filed: 1966-09-28
Abstract: 1,144,359. Tunnelling machines. BETEILIGUNGS-UND PATENTVERWALTUNGS - G.m.b.H. 28 Sept., 1966 [29 Sept., 1965], No. 43389/66. Heading E1F. For the mining out of a tunnel having a flat floor and lower vertical sides there is provided in a tunnelling machine behind a rotary boring head 1 by which the main section of the tunnel is mined out additional rotary or milling cutters 2 for modifying the circular bore formed by the boring head to the required section, the cutters 2 being rotatable about axes parallel to the axis of rotation of the head 1. Cut material is removed from the vicinity of the head 1 and the cutters 2 by an endless, bucket-carrying chain disposed transversely of the machine immediately behind the head and the cutters to follow a path corresponding to the required final section of a tunnel being mined out by the machine.
Patent GB-1322659-A (GB)
Title: Passenger conveyor
IPC: B66B29/06
Filed: 1971-09-22
Abstract: 1322659 Landing plate GOODYEAR TIRE & RUBBER CO 22 Sept 1971 [4 Nov 1970] 44146/71 Heading B8A A landing plate structure for an inclined passenger conveyer comprises a load supporting surface having an upper edge portion 26 inclined at the same angle as the conveyer 2, a horizontal lower portion 28 and an intermediate curved portion 33. A comb 17 mounted on the landing plate intermeshes with ribs and grooves on the conveyer belt to assist smooth transition from the conveyer to a stationary platform, not shown.
Patent GB-1306019-A (GB)
IPC: G21C1/00
Filed: 1971-09-23
Abstract: 1306019 Reactors WESTINGHOUSE ELECTRIC CORP 23 Sept 1971 [25 Nov 1970] 44333/71 Heading G6C In a sodium-cooled, fast breeder reactor, 10, the fuel assemblies, 18, are supported between the plates 16, 20 which are formed of materials which equalize the thermal expansion of the components to retain fuel element alignment. The top plug 12, supporting the control rod drive mechanism, 14, is similarly formed of suitably expanding metal. Vanadium and stainless steel may be employed for the plates 20 and 16 respectively. The temperatures envisaged are plug 12, 400‹ F.; plate 16, 750‹ F.; plate 20, 1000‹ F. The arrangement reduces binding of the control rods and the bending of the fuel assemblies, with its resultant effect of the movement of fuel material towards the core centre.
Patent GB-1131880-A (GB)
Title: Process for shirring artificial sausage casings
IPC: A22C13/02
Filed: 1967-09-29
Abstract: 1,131,880. Shirring sausage casings. KALLE A.G. 29 Sept., 1967 [1 Oct., 1966], No. 44389/67. Heading A2B. In the shirring of artificial sausage casings wherein one end of the casing is passed over a mandrel to a stop and the casing is subjected to internal gas pressure during advancement of the casing on the mandrel towards the stop with concomitant compression and creasing of the casing against the stop, the mandrel is subjected to an oscillatory motion about its axis whilst the casing is advanced substantially along its axis.
Patent GB-1315378-A (GB)
Title: Sensitive silver halide photographic materials
IPC: G03C1/34
Filed: 1970-09-17
Abstract: 1315378 Photographic silver halide materials EASTMAN KODAK CO 17 Sept 1970 [17 Sept 1969] 44452/70 Heading G2C Photographic silver halide materials contain as an anti-foggant in the emulsion layer or a layer adjacent thereto a compound of the formula: - where n is 1-4, each R is alkyl, alkoxy, alkoxycarbonyl, carboxy, aryl, halogen or nitro, provided at least one R is alkoxy, and X is hydrogen, alkyl or heterocyclic group e.g. tetrazolyl, benzothiazolyl and benzoxazolyl.
Patent GB-1524965-A (GB)
Title: Technique for automatic matching of high q-loads
IPC: H03H7/40
Filed: 1974-10-15
Abstract: 1524965 Impedance matching CINCINNATI ELECTRONICS CORP 27 August 1975 [15 Oct 1974] 44583/74 Heading H4A A load circuit is matched to a drive circuit by a matching network having a series reactance and a shunt reactance, by varying one of the reactances until the impedance magnitude seen from the drive circuit has a predetermined value and then varying the other reactance until a predetermined phase relationship exists between the voltage and current supplied by the drive circuit. In the Fig. 1 system, transmitter 11 is matched automatically to aerial 12 by capacitive network 14, 15. In response to the voltage standing wave ratio (VSWR) at the transmitter output rising above a maximum allowable value, VSWR detector 24 initiates a matching process whereby, with capacitor 14 tempororily shorted by switch 18, capacitor 25 is varied from a limit position until the impedance magnitude sensed by detector 21 reaches the predetermined value. This value is a specified function of the transmitter output and aerial impedances and the maximum allowable VSWR. If the drive voltage now leads the drive current, as sensed by phase detector 23, the capacitor 15 variation is stopped: otherwise the variation is continued until the predetermined impedance magnitude again occurs and the phase lead condition is established. Thereafter, switch 18 is opened and capacitor 14 is varied until the drive voltage and current are in phase, completing the matching process. During the matching process, attenuator 28 is in circuit. As shown, capacitors 14 and 15 are varied by reversible D.C. motors 16, 17; but digital electronic variation could be used instead. The impedance changes during matching are explained with the aid of Smith charts (Figs. 5 and 6, not shown). Alternative twin capacitor or twin inductor matching networks are described (Figs. 2, 3, 4, not shown), two of which require that phase detector 23 should sense that the drive voltage lags behind the drive current instead of leading it.
Patent GB-1002126-A (GB)
Title: Improvements in and relating to magnetic tape record apparatus
Inventor: REED GORDON HOWARD
IPC: G11B23/06
Filed: 1960-12-30
Abstract: 1,002,126. Lubricating record tapes. TELEVISION RESEARCH Ltd. Dec. 20, 1961 [Dec. 30, 1960], No. 44704/60. Heading G5R. While the coated surface 11 of an endless magnetic tape is contacting a playback head 9, the uncoated surface 13 is pulled past a pillar 7 carrying a P.T.F.E. sleeve which dry-lubricates the surface to secure freedom of relative movement of the tape turns in the region 6. The tape is carried on a rotary platform 4 in a tape cassette 1. In an alternative embodiment (not described in detail) the P.T.F.E. is applied by a tape/head pressure-pad with a renewable P.T.F.E. shoe. The pad is mounted on a lever whose opposite end rocks to clamp the platform 4 against rotation when the cassette is removed from a machine carrying the head for changing and/or transportation. The coated surface may be treated with graphite to reduce electrostatic charges generated by the relative movements of the tapeturns.
Patent GB-1200980-A (GB)
Title: Improvements in and relating to fire dampers
Inventor: PANTLAND FREDERICK WILLIAM
IPC: A62C2/14
Filed: 1968-09-20
Abstract: 1,200,980. Fire dampers. F. W. PANTLAND. 20 Sept., 1968, No. 44717/68. Heading ASA. A fire damper for an air duct comprises a frame in which is pivotally mounted a single damper blade or an assembly thereof, the frame including a peripheral inwardly-extending flange and a web portion extending parallel with the frame wall(s), the or each blade being pivoted at opposite ends or portions and normally biassed to lie in a vertical plane but restrained by thermoresponsive means which, when released, allows the blade(s) to pivot into a vertical position in which it or they overlay(s) the flange and completely close(s) the frame opening. In the rectangular frame illustrated in Fig. 1, longitudinal blades 32 formed with re-entrant V-shaped folds at their upper and lower edges, engage with channels 16 consisting of side flanges 20, 22 and web 18, by means of bearing members in an aperture in the web. Blades 32 pass freely between portions 24, 26 of the flanges in the vertical position, overlap the outer surfaces of the flanges, providing a seal while still allowing clearance for lengthwise heat expansion of the blades; in this position the top and bottom blades abut the upper and lower transoms 14, 14a, and intermediate blades interengage via their V-shaped folds. The assembly is normally restrained horizontally by means of a thermoresponsive vertical control rod 66 linked to pivoted control arms 64 on each blade. The control rod 66 may be operated by a control arm 70 involving a fusible link of Pb/Su/Bi, nylon, PVC, or polypropylene, or movement of the rod may be initiated electrically if required. In a second embodiment (Fig. 8) a twin-tier rectangular damper assembly may be used, and in a third (Fig. 11) a single disc damper for a cylindrical duct is shown.
Patent GB-927378-A (GB)
Title: Improvements in carburettors for internal combustion engines
Inventor: MENNESSON ANDRE LOUIS
IPC: F02M1/00
Filed: 1961-12-14
Abstract: 927,378. Carburetters. SOC. INDUSTRIELLE DE BREVETS ET D'ETUDES. Dec. 14, 1961 [Dec. 23, 1960], No. 44739/61. Class 7(3).  The same fluid acts successively in heating means 14 for de-icing and on a thermosensitive element 17 controlling an auxiliary starting device. The fluid may be a liquid such as that which has been used for cooling the engine or lubricating oil. The auxiliary starting device may be either of the type having a starter strangler in the air intake 9 or of the auxiliary starting carburetter type.
Patent GB-1263764-A (GB)
Title: Grinding element
Inventor: PORA NICHOLAS
IPC: B02C7/12
Filed: 1969-09-11
Abstract: 1,263,764. Disc mills. N. PORA. 11 Sept., 1969, No. 44803/69. Heading B2A. The fixed and movable discs 26, 24, Fig. 1 of a disc mill 10 each comprise an annular ring 30, Fig. 2, fitted with alternate replaceable grinding blades 39 and spacers 40. An annular member 41 locked by screws 43 secures the blades in position. Each blade may be straight or of arcuate shape and has saw-type teeth 51 whose pitch is finer towards the circumference of the disc. The blades of the fixed and movable discs oppose one another so as to cross. The spacers may be replaced by a filler, e.g. white metal or plastics. In operation, the gap between the discs is varied by actuation of a rod 18. Material is distributed about the disc surface by impellers 28 which also cause an airflow through the mill. The blade 24 may be driven in an anti-clockwise direction, Fig. 2, to produce a smoother grinding action. Further, to asist coarse grinding, crescentshaped grooves may be cut into the face formed by the blades 39 and spacers 40, and to assist fine grinding a band of fine-toothed circular blades may be provided around the periphery.
Patent GB-1237303-A (GB)
Title: Semiconductor device
IPC: H01L23/473
Filed: 1969-09-11
Abstract: 1,237,303. Semi-conductor devices. MITSUBISHI DENKI K.K. 11 Sept., 1969 [11 Sept., 1968], No. 44891/69. Heading H1K. A flat package semi-conductor element 10 is mounted between metal supports 70 around which are situated containers 80 permitting cooling fluid to pass over the surfaces of the supports 70, a compressive contact force applied through the supports 70 not being transmitted through the containers 80. As shown each Cu or Al support 70 includes a truncated conical section carrying ridges or fins and a threaded stud portion through which the force is applied and on to which the thin steel or plastics container 80 is screwed. O-rings seal the containers 80 against Ag or Cu outer diaphragms of the element 10, which also includes a ceramic ring surrounding the Si wafer. The wafer is contacted on one face by a Mo or W plate and on the other face by an alloyed A1 or Au foil or an evaporated and sintered Al, Ni, Au or Ag layer to which is applied a Ag-, A1- or Ni-coated Mo or W plate. The device may be a diode, a transistor or a thyristor. In a modification the supports 70 are formed integrally with the element 10, the outer diaphragms of the element comprising annular members contacting the peripheries of the supports 70.
Patent GB-1458638-A (GB)
Title: High moisture pet food
IPC: A23K1/10
Filed: 1974-10-17
Abstract: 1458638 Moist pet food: imitation meat RALSTON PURINA CO 17 Oct 1974 [18 Sept 1974] 45031/74 Heading A2B A pet food having a moisture content of at least 40% by wt. is made by mixing pasteurised, comin-touited meat, from 25-95% by vol. of expanded protein pieces and a bacteriostatic agent and an antimycotic agent, the resuiking pet food having a shear value of not less than 0.08 ft lb/gram. Specified bacteriostatic agents used in amounts of 0.5 to 3% by wt. are succinic acid, pyruvic acid, fumaric acid, adipic acid, glucono delta lactone, tartaric acid, lactic acid, citric acid, malic acid, calcium acetate or sodium hexametaplhosiphate. Specified antimycotic agents used in amounts of 0.15 to 0.3% by wt are sorbic acid or a salt thereof, propionic acid or a salt thereof, or benzoic acid or a salt thereof. Preferably part of the bacteriostatic agent is blended with the meat and the expanded protein separately prior to mixing the meat with the protein.
Patent GB-1358422-A (GB)
Title: Fuel tank with flexible diaphragm
IPC: B60K15/03
Filed: 1971-09-29
Abstract: 1358422 Laminated products GOODYEAR TIRE & RUBBER CO 29 Sept 1971 [12 Nov 1970] 45333/71 Heading B5N [Also in Division B7] A fuel tank for a vehicle comprises a shaped flexible diaphragm impervious to hydrocarbon fuels and their vapours attached to and dividing the tank into a lower fuel container and an upper air container, each container comprising a rigid concave shell particularly of steel, the fuel container having an inlet (usually capped with a pressure release type valve) and outlet for filling and removal of fuel and the air container having a vent to the atmosphere, the diaphragm being a laminate preshaped to the shape of the fuel container and positioned to be supported by fuel in the fuel container, the laminate comprising at least two layers of a flexible cured polymer adhered to at least one interposed layer of a hydrocarbon fuel barrier material having a neutral bending axis, the cured polymer layers being 5-120 mils thick and being of 1,3- butadiene/acrylonitrile copolymer or a mixture of 100 parts by weight thereof with 10-60 parts of polyvinyl chloride, and the barrier material being a 0.25-10 mil thick film of nylon particularly derived from #-caprolactam, polyvinylidene chloride, copolymers of vinylidene chloride, vinyl chloride, or acrylonitrile, or a polyester of terephthalic and/or isophthalic acids with HO(CH 2 ) n OH where n is 2-10, the ratio of terephthalate units to isophthalate units being from 20 : 80 to 100 : 0, particularly oriented polyethylene terephthalate. The diaphragm may be made by adhering the polymer layers to either side of the barrier material by means of a phenolic, epoxy or acrylonitrilebutadiene copolymer adhesive followed by heating, vacuum drawing and curing.
Patent GB-1390795-A (GB)
Title: Actuating device for a pressurised aerosol dispensing container
IPC: B65D83/16
Filed: 1972-10-05
Abstract: 1390795 Pressurized dispensing containers METAL BOX CO Ltd 9 Aug 1973 [5 Oct 1972] 45989/72 Heading F1R A unitary dispensing cap comprises a cylindrical portion 1 adapted to engage a pressurized container body, and a valve actuating portion 9 having an actuating tab 10 and an outlet member 6 hinged to the portion 1 at 8. The outlet member 6 comprises a bore fitted with a solid core 13 which is either spaced from the bore or is a fit in the bore and provided with at least one groove to provide a restricted outlet passage which communicates with an outlet chamber 19 in a cup 17 formed on the core 13 and fitted with an insert orifice member 16. A cover 24 is fitted to the cap and includes a portion for engaging the rim 27 of a container. A tamper-proof portion 29 is frangibly connected to the cover 24.
Patent GB-968782-A (GB)
Title: Plaster bandage
IPC: A61L15/08
Filed: 1962-12-07
Abstract: A plaster of Paris bandage comprises a woven fabric of which intersecting threads adjacent at least the edges are bonded together by spaced areas of adhesive and which is coated with a plaster of Paris mixture containing the same or another adhesive, the adhesives being compatible with one another.  Wet or dry woven gauze is printed with an adhesive emulsion in a pattern of segmented diagonal lines which may form spaced crosses.  A mixture comprising plaster of Paris, an adhesive and a wetting agent is applied to the fabric as an aqueous slurry and dried.  The adhesives used are insoluble in water and selected from polymers and copolymers of vinyl acetate, e.g. polyvinyl acetate, methacrylic and acrylic esters, cellulosic ethers and esters, coumarone indene resins, natural and synthetic rubbers, rosins and insoluble rosin derivatives.  The wetting agents are alkyl aryl sulphonates, sulphonated esters of fatty alcohols and quaternary ammonium compounds.  Specification 666,563 is referred to.